Be sure to answer all parts. The proteins in our bodies are...

Be sure to answer all parts. The proteins in our bodies are composed of molecules called amino acids. One amino acid is methionine; its molecular formula is C5H11NO2S. Calculate: (a) the formula mass of methionine. 149.23 g/mol (b) the number of oxygen atoms in a mol of this compound. Enter your answer in scientific notation. 1.204 x 10^24 oxygen atoms (c) the mass of oxygen in a mol of the compound. 32.00 g (d) the mass of oxygen in 47.3 g of the compound. 10.72

Transcript

00:01 Hello everyone let's look at the question so here so the formula of methionine that is which is an amino acid is given and we are asked certain questions about this methionin so here the formula of this molecular formula of this methion is c5h11 n o2 s okay now by using this we have to find out a certain question so here the first one is what is the formula mass of this compound now here formula mass is nothing but the mass of the the total molecular mass of the molecular formula so here molecular formula is already now we can find out just by adding the atomic weight of each atom so here so five multiplied by each carbon is 12 plus 11 multiplied by 1 .008 plus nitrogen is there so it is 14 so 2 multiplied by 16 plus for sulfur it is 32 so therefore so this is equal to 149 .23 gram per mole so this is the formula mass of the metheonine okay now let us consider the second question so here we are asked to find out the number of oxygen atom in one mole of the metheny.

01:54 Okay number of oxygen atom present in one mole of methionine now we know that so here one mole of or let us consider that so one more of methionine it has 6 .022 multiplied by it and this to 23 molecules of methenin and each metheonin contains how much two oxygen atoms okay and so each molecule of metheonin so we can say it through a formula only so it has two oxygen atoms.

03:11 So each molecule contains how many has two oxygen atoms.

03:24 But we have how much 6 .022 multiplied by 10 to 23 molecules of metheonin 2 multiplied by 6 .022 multiplied by 10 as to 23 atoms of oxygen.

03:51 So if you multiply this so it will be so 1 .204.

03:57 Multiplied by so 10 to 24 atoms of oxygen okay so here the answer is 1 .204 multiplied by 10 to 24 atoms of oxygen so 1 mol of metheonin so these are all methio okay now let us go to the third question in the third question it is are to find out the mass of oxygen present in 1 mole of methion.

04:49 So here now, so we know that, so 1 mole of metheonin, so it's molecular weight is, so the mass of 1 mole of metheonin is, it is 149 .23 gram per mole...

Question

Please give Ace some feedback